/Engine/Source/Runtime/Online/BuildPatchServices/Public/Interfaces/IBuildManifest.h
Gets a list of files that were installed with the Old Manifest, but no longer required by this Manifest.
void GetOutdatedFiles ( const IBuildManifestRef & OldManifest, [TSet](API\Runtime\Core\Containers\TSet)< [FString](API\Runtime\Core\Containers\FString) > & OutdatedFiles ) const